Men with naturally high levels of the female hormone estrogen may have a greater risk of developing breast cancer, according to research by an international collaboration. This is the first time a link between estrogen levels in the...

A new study narrows down where and how estrogens affect the brain may help in understanding how the hormones affect cognition and memory in women. The team found that adding the hormone to female mouse brains helps boost short-term ...

Boston- Postmenopausal African American women who use female hormone supplements containing estrogen and progestin ("combination" therapy) are at an increased risk for estrogen receptor positive breast cancer.
The study, which appea...

CHAMPAIGN, lll. — A new study of aged female rats found that long-term treatment with estrogen and a synthetic progesterone known as MPA increased levels of a protein marker of synapses in the prefrontal cortex, a brain region known...